Diffusion app.

pull/4/head
Pedro Cuenca 1 year ago
commit be80606e04

@ -0,0 +1,734 @@
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CODE_SIGN_ENTITLEMENTS = Diffusion/Diffusion.entitlements;
CODE_SIGN_STYLE = Automatic;
CURRENT_PROJECT_VERSION = 1;
DEVELOPMENT_ASSET_PATHS = "\"Diffusion/Preview Content\"";
DEVELOPMENT_TEAM = ZWDJQ796RU;
ENABLE_HARDENED_RUNTIME = YES;
ENABLE_PREVIEWS = YES;
GENERATE_INFOPLIST_FILE = YES;
"INFOPLIST_KEY_UIApplicationSceneManifest_Generation[sdk=iphoneos*]" = YES;
"INFOPLIST_KEY_UIApplicationSceneManifest_Generation[sdk=iphonesimulator*]" = YES;
"INFOPLIST_KEY_UIApplicationSupportsIndirectInputEvents[sdk=iphoneos*]" = YES;
"INFOPLIST_KEY_UIApplicationSupportsIndirectInputEvents[sdk=iphonesimulator*]" = YES;
"INFOPLIST_KEY_UILaunchScreen_Generation[sdk=iphoneos*]" = YES;
"INFOPLIST_KEY_UILaunchScreen_Generation[sdk=iphonesimulator*]" = YES;
"INFOPLIST_KEY_UIStatusBarStyle[sdk=iphoneos*]" = UIStatusBarStyleDefault;
"INFOPLIST_KEY_UIStatusBarStyle[sdk=iphonesimulator*]" = UIStatusBarStyleDefault;
INFOPLIST_KEY_UISupportedInterfaceOrientations_iPad = "UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
INFOPLIST_KEY_UISupportedInterfaceOrientations_iPhone = "UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
IPHONEOS_DEPLOYMENT_TARGET = 16.1;
LD_RUNPATH_SEARCH_PATHS = "@executable_path/Frameworks";
"LD_RUNPATH_SEARCH_PATHS[sdk=macosx*]" = "@executable_path/../Frameworks";
MACOSX_DEPLOYMENT_TARGET = 13.0;
MARKETING_VERSION = 1.0;
PRODUCT_BUNDLE_IDENTIFIER = com.pcuenca.Diffusion;
PRODUCT_NAME = "$(TARGET_NAME)";
SDKROOT = auto;
SUPPORTED_PLATFORMS = "iphoneos iphonesimulator";
SUPPORTS_MACCATALYST = YES;
SUPPORTS_MAC_DESIGNED_FOR_IPHONE_IPAD = NO;
SWIFT_EMIT_LOC_STRINGS = YES;
SWIFT_VERSION = 5.0;
TARGETED_DEVICE_FAMILY = "1,2";
};
name = Release;
};
EBE755EE293E37DE00806B32 /* Debug */ = {
isa = XCBuildConfiguration;
buildSettings = {
ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
BUNDLE_LOADER = "$(TEST_HOST)";
CODE_SIGN_STYLE = Automatic;
CURRENT_PROJECT_VERSION = 1;
DEVELOPMENT_TEAM = ZWDJQ796RU;
GENERATE_INFOPLIST_FILE = YES;
IPHONEOS_DEPLOYMENT_TARGET = 16.1;
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MARKETING_VERSION = 1.0;
PRODUCT_BUNDLE_IDENTIFIER = com.pcuenca.DiffusionTests;
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name = Debug;
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MARKETING_VERSION = 1.0;
PRODUCT_BUNDLE_IDENTIFIER = com.pcuenca.DiffusionTests;
PRODUCT_NAME = "$(TARGET_NAME)";
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SWIFT_EMIT_LOC_STRINGS = NO;
SWIFT_VERSION = 5.0;
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};
name = Release;
};
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buildSettings = {
ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
CODE_SIGN_STYLE = Automatic;
CURRENT_PROJECT_VERSION = 1;
DEVELOPMENT_TEAM = ZWDJQ796RU;
GENERATE_INFOPLIST_FILE = YES;
IPHONEOS_DEPLOYMENT_TARGET = 16.1;
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MARKETING_VERSION = 1.0;
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SDKROOT = auto;
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SWIFT_EMIT_LOC_STRINGS = NO;
SWIFT_VERSION = 5.0;
TARGETED_DEVICE_FAMILY = "1,2";
TEST_TARGET_NAME = Diffusion;
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name = Debug;
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EBE755F2293E37DE00806B32 /* Release */ = {
isa = XCBuildConfiguration;
buildSettings = {
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CURRENT_PROJECT_VERSION = 1;
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GENERATE_INFOPLIST_FILE = YES;
IPHONEOS_DEPLOYMENT_TARGET = 16.1;
MACOSX_DEPLOYMENT_TARGET = 13.0;
MARKETING_VERSION = 1.0;
PRODUCT_BUNDLE_IDENTIFIER = com.pcuenca.DiffusionUITests;
PRODUCT_NAME = "$(TARGET_NAME)";
SDKROOT = auto;
SUPPORTED_PLATFORMS = "iphoneos iphonesimulator macosx";
SWIFT_EMIT_LOC_STRINGS = NO;
SWIFT_VERSION = 5.0;
TARGETED_DEVICE_FAMILY = "1,2";
TEST_TARGET_NAME = Diffusion;
};
name = Release;
};
/* End XCBuildConfiguration section */
/* Begin XCConfigurationList section */
EBE755C0293E37DD00806B32 /* Build configuration list for PBXProject "Diffusion" */ = {
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buildConfigurations = (
EBE755E8293E37DE00806B32 /* Debug */,
EBE755E9293E37DE00806B32 /* Release */,
);
defaultConfigurationIsVisible = 0;
defaultConfigurationName = Release;
};
EBE755EA293E37DE00806B32 /* Build configuration list for PBXNativeTarget "Diffusion" */ = {
isa = XCConfigurationList;
buildConfigurations = (
EBE755EB293E37DE00806B32 /* Debug */,
EBE755EC293E37DE00806B32 /* Release */,
);
defaultConfigurationIsVisible = 0;
defaultConfigurationName = Release;
};
EBE755ED293E37DE00806B32 /* Build configuration list for PBXNativeTarget "DiffusionTests" */ = {
isa = XCConfigurationList;
buildConfigurations = (
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EBE755EF293E37DE00806B32 /* Release */,
);
defaultConfigurationIsVisible = 0;
defaultConfigurationName = Release;
};
EBE755F0293E37DE00806B32 /* Build configuration list for PBXNativeTarget "DiffusionUITests" */ = {
isa = XCConfigurationList;
buildConfigurations = (
EBE755F1293E37DE00806B32 /* Debug */,
EBE755F2293E37DE00806B32 /* Release */,
);
defaultConfigurationIsVisible = 0;
defaultConfigurationName = Release;
};
/* End XCConfigurationList section */
/* Begin XCRemoteSwiftPackageReference section */
EBB5BA5629425E17003A2A5B /* XCRemoteSwiftPackageReference "Path.swift" */ = {
isa = XCRemoteSwiftPackageReference;
repositoryURL = "https://github.com/mxcl/Path.swift.git";
requirement = {
kind = upToNextMajorVersion;
minimumVersion = 1.0.0;
};
};
EBB5BA5B294504DE003A2A5B /* XCRemoteSwiftPackageReference "ZIPFoundation" */ = {
isa = XCRemoteSwiftPackageReference;
repositoryURL = "https://github.com/weichsel/ZIPFoundation.git";
requirement = {
kind = upToNextMajorVersion;
minimumVersion = 0.9.9;
};
};
EBB5BA5E2946365A003A2A5B /* XCRemoteSwiftPackageReference "ml-stable-diffusion" */ = {
isa = XCRemoteSwiftPackageReference;
repositoryURL = "https://github.com/pcuenca/ml-stable-diffusion";
requirement = {
branch = main;
kind = branch;
};
};
/* End XCRemoteSwiftPackageReference section */
/* Begin XCSwiftPackageProductDependency section */
EBB5BA5729425E17003A2A5B /* Path */ = {
isa = XCSwiftPackageProductDependency;
package = EBB5BA5629425E17003A2A5B /* XCRemoteSwiftPackageReference "Path.swift" */;
productName = Path;
};
EBB5BA5C294504DE003A2A5B /* ZIPFoundation */ = {
isa = XCSwiftPackageProductDependency;
package = EBB5BA5B294504DE003A2A5B /* XCRemoteSwiftPackageReference "ZIPFoundation" */;
productName = ZIPFoundation;
};
EBB5BA5F2946365A003A2A5B /* StableDiffusion */ = {
isa = XCSwiftPackageProductDependency;
package = EBB5BA5E2946365A003A2A5B /* XCRemoteSwiftPackageReference "ml-stable-diffusion" */;
productName = StableDiffusion;
};
/* End XCSwiftPackageProductDependency section */
};
rootObject = EBE755BD293E37DD00806B32 /* Project object */;
}

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<?xml version="1.0" encoding="UTF-8"?>
<Workspace
version = "1.0">
<FileRef
location = "self:">
</FileRef>
</Workspace>

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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>IDEDidComputeMac32BitWarning</key>
<true/>
</dict>
</plist>

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{
"colors" : [
{
"idiom" : "universal"
}
],
"info" : {
"author" : "xcode",
"version" : 1
}
}

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{
"images" : [
{
"filename" : "labrador-x2.png",
"idiom" : "universal",
"platform" : "ios",
"size" : "1024x1024"
},
{
"idiom" : "mac",
"scale" : "1x",
"size" : "16x16"
},
{
"idiom" : "mac",
"scale" : "2x",
"size" : "16x16"
},
{
"idiom" : "mac",
"scale" : "1x",
"size" : "32x32"
},
{
"idiom" : "mac",
"scale" : "2x",
"size" : "32x32"
},
{
"idiom" : "mac",
"scale" : "1x",
"size" : "128x128"
},
{
"idiom" : "mac",
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"idiom" : "mac",
"scale" : "1x",
"size" : "256x256"
},
{
"idiom" : "mac",
"scale" : "2x",
"size" : "256x256"
},
{
"idiom" : "mac",
"scale" : "1x",
"size" : "512x512"
},
{
"filename" : "labrador-x2 1.png",
"idiom" : "mac",
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"size" : "512x512"
}
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{
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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>com.apple.security.app-sandbox</key>
<true/>
<key>com.apple.security.files.user-selected.read-only</key>
<true/>
<key>com.apple.security.network.client</key>
<true/>
</dict>
</plist>

@ -0,0 +1,20 @@
//
// DiffusionApp.swift
// Diffusion
//
// Created by Pedro Cuenca on December 2022.
// See LICENSE at https://github.com/huggingface/swift-coreml-diffusers/LICENSE
//
import SwiftUI
@main
struct DiffusionApp: App {
var body: some Scene {
WindowGroup {
LoadingView()
}
}
}
extension String: Error {}

@ -0,0 +1,91 @@
//
// Downloader.swift
// Diffusion
//
// Created by Pedro Cuenca on December 2022.
// See LICENSE at https://github.com/huggingface/swift-coreml-diffusers/LICENSE
//
import Foundation
import Combine
import Path
class Downloader: NSObject, ObservableObject {
private(set) var destination: URL
enum DownloadState {
case notStarted
case downloading(Double)
case completed(URL)
case failed(Error)
}
private(set) lazy var downloadState: CurrentValueSubject<DownloadState, Never> = CurrentValueSubject(.notStarted)
private var stateSubscriber: Cancellable?
init(from url: URL, to destination: URL) {
self.destination = destination
super.init()
// .background allows downloads to proceed in the background
let config = URLSessionConfiguration.background(withIdentifier: "net.pcuenca.diffusion.download")
let urlSession = URLSession(configuration: config, delegate: self, delegateQueue: OperationQueue())
downloadState.value = .downloading(0)
urlSession.getAllTasks { tasks in
// If there's an existing pending background task, let it proceed, otherwise start a new one.
// TODO: check URL when we support downloading more models.
if tasks.first == nil {
urlSession.downloadTask(with: url).resume()
}
}
}
@discardableResult
func waitUntilDone() throws -> URL {
// It's either this, or stream the bytes ourselves (add to a buffer, save to disk, etc; boring and finicky)
let semaphore = DispatchSemaphore(value: 0)
stateSubscriber = downloadState.sink { state in
switch state {
case .completed: semaphore.signal()
case .failed: semaphore.signal()
default: break
}
}
semaphore.wait()
switch downloadState.value {
case .completed(let url): return url
case .failed(let error): throw error
default: throw("Should never happen, lol")
}
}
}
extension Downloader: URLSessionDelegate, URLSessionDownloadDelegate {
func urlSession(_: URLSession, downloadTask: URLSessionDownloadTask, didWriteData _: Int64, totalBytesWritten _: Int64, totalBytesExpectedToWrite _: Int64) {
downloadState.value = .downloading(downloadTask.progress.fractionCompleted)
}
func urlSession(_: URLSession, downloadTask _: URLSessionDownloadTask, didFinishDownloadingTo location: URL) {
guard let path = Path(url: location) else {
downloadState.value = .failed("Invalid download location received: \(location)")
return
}
guard let toPath = Path(url: destination) else {
downloadState.value = .failed("Invalid destination: \(destination)")
return
}
do {
try path.move(to: toPath, overwrite: true)
downloadState.value = .completed(destination)
} catch {
downloadState.value = .failed(error)
}
}
func urlSession(_: URLSession, task: URLSessionTask, didCompleteWithError error: Error?) {
if let error = error {
downloadState.value = .failed(error)
}
}
}

@ -0,0 +1,56 @@
//
// Pipeline.swift
// Diffusion
//
// Created by Pedro Cuenca on December 2022.
// See LICENSE at https://github.com/huggingface/swift-coreml-diffusers/LICENSE
//
import Foundation
import CoreML
import Combine
import StableDiffusion
typealias StableDiffusionProgress = StableDiffusionPipeline.Progress
class Pipeline {
let pipeline: StableDiffusionPipeline
var progress: StableDiffusionProgress? = nil {
didSet {
progressPublisher.value = progress
}
}
lazy private(set) var progressPublisher: CurrentValueSubject<StableDiffusionProgress?, Never> = CurrentValueSubject(progress)
init(_ pipeline: StableDiffusionPipeline) {
self.pipeline = pipeline
}
func generate(prompt: String, scheduler: StableDiffusionScheduler, numInferenceSteps stepCount: Int = 50, seed: UInt32? = nil) throws -> CGImage {
let beginDate = Date()
print("Generating...")
let theSeed = seed ?? UInt32.random(in: 0..<UInt32.max)
let images = try pipeline.generateImages(
prompt: prompt,
imageCount: 1,
stepCount: stepCount,
seed: theSeed,
scheduler: scheduler
) { progress in
handleProgress(progress)
return true
}
print("Got images: \(images) in \(Date().timeIntervalSince(beginDate))")
// unwrap the 1 image we asked for
guard let image = images.compactMap({ $0 }).first else { throw "Generation failed" }
return image
}
func handleProgress(_ progress: StableDiffusionPipeline.Progress) {
self.progress = progress
}
}

@ -0,0 +1,141 @@
//
// PipelineLoader.swift
// Diffusion
//
// Created by Pedro Cuenca on December 2022.
// See LICENSE at https://github.com/huggingface/swift-coreml-diffusers/LICENSE
//
import CoreML
import Combine
import Path
import ZIPFoundation
import StableDiffusion
class PipelineLoader {
static let models = Path.applicationSupport / "models"
let url: URL
private var downloadSubscriber: Cancellable?
init(url: URL) {
self.url = url
state = .undetermined
setInitialState()
}
enum PipelinePreparationPhase {
case undetermined
case waitingToDownload
case downloading(Double)
case downloaded
case uncompressing
case readyOnDisk
case loaded
case failed(Error)
}
var state: PipelinePreparationPhase {
didSet {
statePublisher.value = state
}
}
private(set) lazy var statePublisher: CurrentValueSubject<PipelinePreparationPhase, Never> = CurrentValueSubject(state)
func setInitialState() {
if ready {
state = .readyOnDisk
return
}
if downloaded {
state = .downloaded
return
}
state = .waitingToDownload
}
}
extension PipelineLoader {
static func removeAll() {
try? models.delete()
}
}
extension PipelineLoader {
var filename: String {
return url.lastPathComponent
}
var downloadedPath: Path { PipelineLoader.models / filename }
var downloadedURL: URL { downloadedPath.url }
var uncompressPath: Path { downloadedPath.parent }
var packagesFilename: String { downloadedPath.basename(dropExtension: true) }
var compiledPath: Path { downloadedPath.parent/packagesFilename }
var downloaded: Bool {
return downloadedPath.exists
}
var ready: Bool {
return compiledPath.exists
}
// TODO: maybe receive Progress to add another progress as child
func prepare() async throws -> Pipeline {
do {
try PipelineLoader.models.mkdir(.p)
try await download()
try await unzip()
let pipeline = try await load(url: compiledPath.url)
return Pipeline(pipeline)
} catch {
state = .failed(error)
throw error
}
}
@discardableResult
func download() async throws -> URL {
if ready || downloaded { return downloadedURL }
let downloader = Downloader(from: url, to: downloadedURL)
downloadSubscriber = downloader.downloadState.sink { state in
if case .downloading(let progress) = state {
print(progress)
self.state = .downloading(progress)
}
}
try downloader.waitUntilDone()
return downloadedURL
}
func unzip() async throws {
guard downloaded else { return }
state = .uncompressing
do {
try FileManager().unzipItem(at: downloadedURL, to: uncompressPath.url)
} catch {
// Cleanup if error occurs while unzipping
try uncompressPath.delete()
throw error
}
try downloadedPath.delete()
state = .readyOnDisk
}
func load(url: URL) async throws -> StableDiffusionPipeline {
let beginDate = Date()
let configuration = MLModelConfiguration()
configuration.computeUnits = .cpuAndGPU // .all works for v1.4, but not for v1.5. TODO: measure performance on different devices
let pipeline = try StableDiffusionPipeline(resourcesAt: url,
configuration: configuration,
disableSafety: false)
print("Pipeline loaded in \(Date().timeIntervalSince(beginDate))")
state = .loaded
return pipeline
}
}

@ -0,0 +1,6 @@
{
"info" : {
"author" : "xcode",
"version" : 1
}
}

@ -0,0 +1,97 @@
//
// Loading.swift
// Diffusion
//
// Created by Pedro Cuenca on December 2022.
// See LICENSE at https://github.com/huggingface/swift-coreml-diffusers/LICENSE
//
import SwiftUI
import Combine
let PIPELINE_URL = "https://huggingface.co/pcuenq/coreml-stable-diffusion/resolve/main/coreml-stable-diffusion-v1-5_original_compiled.zip"
class DiffusionGlobals: ObservableObject {
@Published var pipeline: Pipeline? = nil
}
struct LoadingView: View {
@StateObject var context = DiffusionGlobals()
@State private var preparationPhase = "Downloading…"
@State private var downloadProgress: Double = 0
enum CurrentView {
case loading
case textToImage
case error(String)
}
@State private var currentView: CurrentView = .loading
@State private var stateSubscriber: Cancellable?
var body: some View {
VStack {
switch currentView {
case .textToImage: TextToImage().transition(.opacity)
case .error(let message): ErrorPopover(errorMessage: message).transition(.move(edge: .top))
case .loading:
// TODO: Don't present progress view if the pipeline is cached
ProgressView(preparationPhase, value: downloadProgress, total: 1).padding()
}
}
.animation(.easeIn, value: currentView)
.environmentObject(context)
.onAppear {
Task.init {
let loader = PipelineLoader(url: URL(string: PIPELINE_URL)!)
stateSubscriber = loader.statePublisher.sink { state in
DispatchQueue.main.async {
switch state {
case .downloading(let progress):
preparationPhase = "Downloading"
downloadProgress = progress
case .uncompressing:
preparationPhase = "Uncompressing"
downloadProgress = 1
case .readyOnDisk:
preparationPhase = "Loading"
downloadProgress = 1
default:
break
}
}
}
do {
context.pipeline = try await loader.prepare()
self.currentView = .textToImage
} catch {
self.currentView = .error("Could not load model, error: \(error)")
}
}
}
}
}
// Required by .animation
extension LoadingView.CurrentView: Equatable {}
struct ErrorPopover: View {
var errorMessage: String
var body: some View {
Text(errorMessage)
.font(.headline)
.padding()
.foregroundColor(.red)
.background(Color.white)
.cornerRadius(8)
.shadow(color: Color.black.opacity(0.2), radius: 8, x: 0, y: 4)
}
}
struct LoadingView_Previews: PreviewProvider {
static var previews: some View {
LoadingView()
}
}

@ -0,0 +1,104 @@
//
// TextToImage.swift
// Diffusion
//
// Created by Pedro Cuenca on December 2022.
// See LICENSE at https://github.com/huggingface/swift-coreml-diffusers/LICENSE
//
import SwiftUI
import Combine
import StableDiffusion
// TODO: bind to UI controls
let scheduler = StableDiffusionScheduler.dpmpp
let steps = 25
let seed: UInt32? = nil
func generate(pipeline: Pipeline?, prompt: String) async -> CGImage? {
guard let pipeline = pipeline else { return nil }
return try? pipeline.generate(prompt: prompt, scheduler: scheduler, numInferenceSteps: steps, seed: seed)
}
enum GenerationState {
case startup
case running(StableDiffusionProgress?)
case idle
}
struct ImageWithPlaceholder: View {
var image: Binding<CGImage?>
var state: Binding<GenerationState>
var body: some View {
switch state.wrappedValue {
case .startup: return AnyView(Image("placeholder").resizable())
case .running(let progress):
guard let progress = progress, progress.stepCount > 0 else {
// The first time it takes a little bit before generation starts
return AnyView(ProgressView())
}
let step = Int(progress.step) + 1
let fraction = Double(step) / Double(progress.stepCount)
let label = "Step \(step) of \(progress.stepCount)"
return AnyView(ProgressView(label, value: fraction, total: 1).padding())
default:
guard let theImage = image.wrappedValue else {
return AnyView(Image(systemName: "exclamationmark.triangle").resizable())
}
let imageView = Image(theImage, scale: 1, label: Text("generated"))
return AnyView(
VStack {
imageView.resizable().clipShape(RoundedRectangle(cornerRadius: 20))
ShareLink(item: imageView, preview: SharePreview("Generated image", image: imageView))
})
}
}
}
struct TextToImage: View {
@EnvironmentObject var context: DiffusionGlobals
@State private var prompt = "Labrador in the style of Vermeer"
@State private var image: CGImage? = nil
@State private var state: GenerationState = .startup
@State private var progressSubscriber: Cancellable?
func submit() {
if case .running = state { return }
Task {
state = .running(nil)
image = await generate(pipeline: context.pipeline, prompt: prompt)
state = .idle
}
}
var body: some View {
VStack {
HStack {
TextField("Prompt", text: $prompt)
.textFieldStyle(.roundedBorder)
.onSubmit {
submit()
}
Button("Generate") {
submit()
}
.padding()
.buttonStyle(.borderedProminent)
}
ImageWithPlaceholder(image: $image, state: $state)
.scaledToFit()
Spacer()
}
.padding()
.onAppear {
progressSubscriber = context.pipeline!.progressPublisher.sink { progress in
guard let progress = progress else { return }
state = .running(progress)
}
}
}
}

@ -0,0 +1,35 @@
//
// DiffusionTests.swift
// DiffusionTests
//
// Created by Pedro Cuenca on December 2022.
//
import XCTest
final class DiffusionTests: XCTestCase {
override func setUpWithError() throws {
// Put setup code here. This method is called before the invocation of each test method in the class.
}
override func tearDownWithError() throws {
// Put teardown code here. This method is called after the invocation of each test method in the class.
}
func testExample() throws {
// This is an example of a functional test case.
// Use XCTAssert and related functions to verify your tests produce the correct results.
// Any test you write for XCTest can be annotated as throws and async.
// Mark your test throws to produce an unexpected failure when your test encounters an uncaught error.
// Mark your test async to allow awaiting for asynchronous code to complete. Check the results with assertions afterwards.
}
func testPerformanceExample() throws {
// This is an example of a performance test case.
measure {
// Put the code you want to measure the time of here.
}
}
}

@ -0,0 +1,41 @@
//
// DiffusionUITests.swift
// DiffusionUITests
//
// Created by Pedro Cuenca on December 2022.
//
import XCTest
final class DiffusionUITests: XCTestCase {
override func setUpWithError() throws {
// Put setup code here. This method is called before the invocation of each test method in the class.
// In UI tests it is usually best to stop immediately when a failure occurs.
continueAfterFailure = false
// In UI tests its important to set the initial state - such as interface orientation - required for your tests before they run. The setUp method is a good place to do this.
}
override func tearDownWithError() throws {
// Put teardown code here. This method is called after the invocation of each test method in the class.
}
func testExample() throws {
// UI tests must launch the application that they test.
let app = XCUIApplication()
app.launch()
// Use XCTAssert and related functions to verify your tests produce the correct results.
}
func testLaunchPerformance() throws {
if #available(macOS 10.15, iOS 13.0, tvOS 13.0, watchOS 7.0, *) {
// This measures how long it takes to launch your application.
measure(metrics: [XCTApplicationLaunchMetric()]) {
XCUIApplication().launch()
}
}
}
}

@ -0,0 +1,32 @@
//
// DiffusionUITestsLaunchTests.swift
// DiffusionUITests
//
// Created by Pedro Cuenca on December 2022.
//
import XCTest
final class DiffusionUITestsLaunchTests: XCTestCase {
override class var runsForEachTargetApplicationUIConfiguration: Bool {
true
}
override func setUpWithError() throws {
continueAfterFailure = false
}
func testLaunch() throws {
let app = XCUIApplication()
app.launch()
// Insert steps here to perform after app launch but before taking a screenshot,
// such as logging into a test account or navigating somewhere in the app
let attachment = XCTAttachment(screenshot: app.screenshot())
attachment.name = "Launch Screen"
attachment.lifetime = .keepAlways
add(attachment)
}
}

@ -0,0 +1,201 @@
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@ -0,0 +1,23 @@
# Diffusion
This is a simple app that shows how to integrate Apple's [Core ML Stable Diffusion implementation](https://github.com/apple/ml-stable-diffusion) in a native Swift UI application. It can be used for faster iteration, or as sample code for other use cases.
On first launch, the application downloads a zipped archive with a Core ML version of Runway's Stable Diffusion v1.5, from [this location in the Hugging Face Hub](https://huggingface.co/pcuenq/coreml-stable-diffusion/tree/main). This process takes a while, as several GB of data have to be downloaded and unarchived.
For faster inference, we use a very fast scheduler: [DPM-Solver++](https://github.com/LuChengTHU/dpm-solver) that we ported to Swift. Since this scheduler is still not available in Apple's GitHub repository, the application depends on the following fork instead: https://github.com/pcuenca/ml-stable-diffusion. Our Swift port is based on [Diffusers' DPMSolverMultistepScheduler](https://github.com/huggingface/diffusers/blob/main/src/diffusers/schedulers/scheduling_dpmsolver_multistep.py), with a number of simplifications.
## Limitations
- Requires the latest betas of iOS 16.2, macOS Ventura 13.1, Xcode 14.2. They are all in the Release Candidate stage.
- Although the app is platform independent, execution fails on iPhone 13 Pro, possibly due to memory constraints. We haven't tested on M2 iPads with 8 or 16 GB of memory.
- The UI does not expose a way to configure the scheduler, number of inference steps, or generation seed. These are all available in the underlying code.
- A single model (Stable Diffusion v1.5) is considered. The Core ML compute units have been hardcoded to CPU and GPU, since that's what gives best results on my Mac (M1 Max MacBook Pro).
- Sometimes generation returns a `nil` image. This needs to be investigated.
## Next Steps
- Improve UI. Allow the user to select generation parameters.
- Allow other models to run. Provide a recommended "compute units" configuration based on model and platform.
- Implement other interesting schedulers.
- Implement negative prompts.
- Explore other features (image to image, for example).
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